Like the National Panasonic receivers of the SA-6500 and SA-6200 class, which have outperformed other brands in tonal output, the SA-6800X incorporates an all-stage, direct coupled OCL differential amplifier.
To improve upon the linearity and damping factor at the lower frequency ranges, the less efficient output condenser design has been abandoned.
Moreover, to improve upon the direct current safety factors, differential amplification circuitry is incorporated in the first stage, to reduce heat, current and voltage fluctuations.
The exciting SA-6800X incorporates a special encoding-decoding circuit to amplify ordinary 2-channel input signals to a big new 4-channel sound.
With its 4 channel Matrix circuit, it is also possible to convert all your 2-channel material to 4-channel sound and record it.
Also, since it features completely variable AFD controls, you can match its decoding factors with the matrix encoding factor of any 4-2-4 records, thus, recreating the original acoustic conditions.
But the real secret of quality 4-channel reproduction is in the phase difference in the rear speakers. The SA-6800X's Mode Selector Switch enables you to select either a 90°, 0° or 180° phase difference.
To match the acoustic dimensions of the discrete 4-channel program material with the spatial arrangement of your listening room, the SA-6800X is equipped with a special 4-channel discrete AFD circuit.
When the Mode Selector Switch is set to 4-channel discrete AFD, you can easily reshape the speaker output to fit any listening space by sliding the AFD Width and Depth controls to suit your needs perfectly.
Tuning range: FM, MW
Power output: 42W/ch into 8Ω (quadraphonic)
Frequency response: 20Hz to 50kHz
Total harmonic distortion: 0.5%
Damping factor: 40
Input sensitivity: 3mV (MM), 200mV (line)
Signal to noise ratio: 73dB (MM), 85dB (line)
Output: 200mV (line)
Speaker load impedance: 4Ω (minimum)
Dimensions: 453 x 157 x 408mm
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